L102
Multi-Spring Diaphragm Pneumatic Actuator
Design Features
The L102 is a multi-spring diaphragm pneumatic actuator built to drive linear-stroke control valves. Compressed air acts on a diaphragm inside the housing; the diaphragm pushes against a spring pack and moves the push rod in a straight line, which the yoke and guide bushing transfer to the valve stem. When the air supply is interrupted, the compressed springs extend and return the push rod to its preset position — the classic spring-return, fail-safe-on-air-loss behavior that single-acting actuators are specified for.
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| Product Name | Multi-spring diaphragm pneumatic actuator |
| Product Model | L102 |
| Actuator Type | Diaphragm, spring-return (single-acting) |
| Motion | Linear (for linear-stroke control valves) |
| Standard travel | 16 mm |
| Power source | Compressed air |
| Number of Springs | Adjustable to suit the application |
| Net weight | 30.87 kg (68.1 lb) |
| Diaphragm material | NBR with nylon fabric reinforcement |
| Spring material | 60Si2MnA spring steel |
| Air Port Connection | NAMUR standard (NAMUR solenoid valve direct-mount) |
| Push rod material | 20Cr13 (martensitic stainless steel) |
| Yoke material | WCB / CFB |
| Guide bushing material | 304 stainless steel |
| Sealing / dust protection | NBR (O-rings and C-profile wiper seals) |
| Manual override | C0 Series side-mounted handwheel; C2 for L102/L103 (16 mm / 25 mm travel) |
| Remarks | Other special sealing materials or special temperature requirements can also be designed and selected according to customer specifications. |